/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.rocketmq;

import org.apache.iotdb.rpc.IoTDBConnectionException;
import org.apache.iotdb.rpc.StatementExecutionException;
import org.apache.iotdb.session.Session;
import org.apache.iotdb.tsfile.file.metadata.enums.CompressionType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding;
import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeOrderlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerOrderly;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
import org.apache.rocketmq.common.message.MessageExt;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class RocketMQConsumer {

    private static final Logger logger = LoggerFactory.getLogger(RocketMQConsumer.class);
    private static Session session;
    private DefaultMQPushConsumer consumer;
    private String producerGroup;
    private String serverAddresses;

    public RocketMQConsumer(
            String producerGroup,
            String serverAddresses,
            String connectionHost,
            int connectionPort,
            String user,
            String password)
            throws IoTDBConnectionException, StatementExecutionException {
        this.producerGroup = producerGroup;
        this.serverAddresses = serverAddresses;
        this.consumer = new DefaultMQPushConsumer(producerGroup);
        this.consumer.setNamesrvAddr(serverAddresses);
        initIoTDB(connectionHost, connectionPort, user, password);
    }

    public static void main(String[] args)
            throws MQClientException, StatementExecutionException, IoTDBConnectionException {
        /** Instantiate with specified consumer group name and specify name server addresses. */
        RocketMQConsumer consumer =
                new RocketMQConsumer(
                        Constant.CONSUMER_GROUP,
                        Constant.SERVER_ADDRESS,
                        Constant.IOTDB_CONNECTION_HOST,
                        Constant.IOTDB_CONNECTION_PORT,
                        Constant.IOTDB_CONNECTION_USER,
                        Constant.IOTDB_CONNECTION_PASSWORD);
        consumer.prepareConsume();
        consumer.addStorageGroup(Constant.ADDITIONAL_STORAGE_GROUP);
        consumer.start();
    }

    private void initIoTDB(String host, int port, String user, String password)
            throws IoTDBConnectionException, StatementExecutionException {
        if (host == null) {
            host = Constant.IOTDB_CONNECTION_HOST;
            port = Constant.IOTDB_CONNECTION_PORT;
        }
        user = (user == null ? Constant.IOTDB_CONNECTION_USER : user);
        password = (password == null ? Constant.IOTDB_CONNECTION_PASSWORD : password);
        session = new Session(host, port, user, password);
        session.open();
        for (String storageGroup : Constant.STORAGE_GROUP) {
            addStorageGroup(storageGroup);
        }
        for (String[] sql : Constant.CREATE_TIMESERIES) {
            createTimeseries(sql);
        }
    }

    private void addStorageGroup(String storageGroup)
            throws IoTDBConnectionException, StatementExecutionException {
        session.setStorageGroup(storageGroup);
    }

    private void createTimeseries(String[] sql)
            throws StatementExecutionException, IoTDBConnectionException {
        String timeseries = sql[0];
        TSDataType dataType = TSDataType.valueOf(sql[1]);
        TSEncoding encoding = TSEncoding.valueOf(sql[2]);
        CompressionType compressionType = CompressionType.valueOf(sql[3]);
        session.createTimeseries(timeseries, dataType, encoding, compressionType);
    }

    private void insert(String data) throws IoTDBConnectionException, StatementExecutionException {
        String[] dataArray = data.split(",");
        String device = dataArray[0];
        long time = Long.parseLong(dataArray[1]);
        List<String> measurements = Arrays.asList(dataArray[2].split(":"));
        List<TSDataType> types = new ArrayList<>();
        for (String type : dataArray[3].split(":")) {
            types.add(TSDataType.valueOf(type));
        }

        List<Object> values = new ArrayList<>();
        String[] valuesStr = dataArray[4].split(":");
        for (int i = 0; i < valuesStr.length; i++) {
            switch (types.get(i)) {
                case INT64:
                    values.add(Long.parseLong(valuesStr[i]));
                    break;
                case DOUBLE:
                    values.add(Double.parseDouble(valuesStr[i]));
                    break;
                case INT32:
                    values.add(Integer.parseInt(valuesStr[i]));
                    break;
                case TEXT:
                    values.add(valuesStr[i]);
                    break;
                case FLOAT:
                    values.add(Float.parseFloat(valuesStr[i]));
                    break;
                case BOOLEAN:
                    values.add(Boolean.parseBoolean(valuesStr[i]));
                    break;
            }
        }

        session.insertRecord(device, time, measurements, types, values);
    }

    public void start() throws MQClientException {
        consumer.start();
    }

    /**
     * Subscribe topic and add register Listener
     *
     * @throws MQClientException
     */
    public void prepareConsume() throws MQClientException {
        /** Subscribe one more more topics to consume. */
        consumer.subscribe(Constant.TOPIC, "*");
        /**
         * Setting Consumer to start first from the head of the queue or from the tail of the queue If
         * not for the first time, then continue to consume according to the position of last
         * consumption.
         */
        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
        /** Register callback to execute on arrival of messages fetched from brokers. */
        consumer.registerMessageListener(
                (MessageListenerOrderly)
                        (msgs, context) -> {
                            for (MessageExt msg : msgs) {
                                logger.info(
                                        String.format(
                                                "%s Receive New Messages: %s %n",
                                                Thread.currentThread().getName(), new String(msg.getBody())));
                                try {
                                    insert(new String(msg.getBody()));
                                } catch (Exception e) {
                                    logger.error(e.getMessage());
                                }
                            }
                            return ConsumeOrderlyStatus.SUCCESS;
                        });
    }

    public void shutdown() {
        consumer.shutdown();
    }

    public String getProducerGroup() {
        return producerGroup;
    }

    public void setProducerGroup(String producerGroup) {
        this.producerGroup = producerGroup;
    }

    public String getServerAddresses() {
        return serverAddresses;
    }

    public void setServerAddresses(String serverAddresses) {
        this.serverAddresses = serverAddresses;
    }
}
